1321265433 has 8 divisors (see below), whose sum is σ = 1822435200. Its totient is φ = 850469648.

The previous prime is 1321265419. The next prime is 1321265437. The reversal of 1321265433 is 3345621231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321265433 - 2²⁵ = 1287711001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1321265433.

It is not an unprimeable number, because it can be changed into a prime (1321265437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7593393 + ... + 7593566.

It is an arithmetic number, because the mean of its divisors is an integer number (227804400).

Almost surely, 2^1321265433 is an apocalyptic number.

It is an amenable number.

1321265433 is a deficient number, since it is larger than the sum of its proper divisors (501169767).

1321265433 is a wasteful number, since it uses less digits than its factorization.

1321265433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15186991.

The product of its digits is 12960, while the sum is 30.

The square root of 1321265433 is about 36349.2150259122. The cubic root of 1321265433 is about 1097.3117366723.

Adding to 1321265433 its reverse (3345621231), we get a palindrome (4666886664).

The spelling of 1321265433 in words is "one billion, three hundred twenty-one million, two hundred sixty-five thousand, four hundred thirty-three".